Windows update will not download updates – stuck at 0% downloading
1) Stop the Windows Update service.
You might have to disable the service then restart your computer to be able to get it to stop.
You might also have to stop the Application Experience service.
2) After that, delete everything within the C:\Windows\SoftwareDistribution folder, but not the folder itself.
3) Start the Application Experience service and enable Windows Update service.
4) Check for updates and try to download them. It should work now.